FillCallback.java revision 640f30a7763b0a4b80c767acb84c740aac04768b 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.service.autofill;
18
19import android.annotation.Nullable;
20import android.app.Activity;
21import android.os.Bundle;
22import android.os.RemoteException;
23
24/**
25 * Handles autofill requests from the {@link AutofillService} into the {@link Activity} being
26 * autofilled.
27 */
28public final class FillCallback {
29    private final IFillCallback mCallback;
30    private boolean mCalled;
31
32    /** @hide */
33    public FillCallback(IFillCallback callback) {
34        mCallback = callback;
35    }
36
37    /**
38     * Notifies the Android System that an
39     * {@link AutofillService#onFillRequest(android.app.assist.AssistStructure, Bundle,
40     * android.os.CancellationSignal, FillCallback)} was successfully fulfilled by the service.
41     *
42     * @param response autofill information for that activity, or {@code null} when the activity
43     * cannot be autofilled (for example, if it only contains read-only fields). See
44     * {@link FillResponse} for examples.
45     */
46    public void onSuccess(@Nullable FillResponse response) {
47        assertNotCalled();
48        mCalled = true;
49        try {
50            mCallback.onSuccess(response);
51        } catch (RemoteException e) {
52            e.rethrowAsRuntimeException();
53        }
54    }
55
56    /**
57     * Notifies the Android System that an
58     * {@link AutofillService#onFillRequest(android.app.assist.AssistStructure,
59     * Bundle, android.os.CancellationSignal, FillCallback)}
60     * could not be fulfilled by the service.
61     *
62     * @param message error message to be displayed to the user.
63     */
64    public void onFailure(@Nullable CharSequence message) {
65        assertNotCalled();
66        mCalled = true;
67        try {
68            mCallback.onFailure(message);
69        } catch (RemoteException e) {
70            e.rethrowAsRuntimeException();
71        }
72    }
73
74    private void assertNotCalled() {
75        if (mCalled) {
76            throw new IllegalStateException("Already called");
77        }
78    }
79}
80